Filter holder



FIG. 1 is a top perspective view of a filter holder showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevational view thereof, where the rear, left, right elevational views are identical thereto;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a top view showing the filter holder in a position of use in its environment; and,

FIG. 7 is another top perspective view of the filter holder shown in its environment.

The broken lines shown in FIGS. 6-7 illustrate environment and form no part of the claimed design. 

CLAIM The ornamental design for a filter holder, as shown and described. 